1、BSI Standards Publication Rubber or plastics covered rollers Specifications Part 2: Surface characteristics BS ISO 6123-2:2015National foreword This British Standard is the UK implementation of ISO 6123-2:2015. The UK participation in its preparation was entrusted to Technical Committee PRI/73, Indu
2、strial rubber products. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 201
3、5. Published by BSI Standards Limited 2015 ISBN 978 0 580 89019 2 ICS 83.140.99 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 December 2015. Amendments/cor
4、rigenda issued since publication Date Text affected BRITISH STANDARD BS ISO 6123-2:2015 ISO 2015 Rubber or plastics covered rollers Specifications Part 2: Surface characteristics Cylindres revtus de caoutchouc ou de plastique Spcifications Partie 2: Caractristiques de surface INTERNATIONAL STANDARD
5、ISO 6123-2 Third edition 2015-12-01 Reference number ISO 6123-2:2015(E) BS ISO 6123-2:2015 ISO 6123-2:2015(E)ii ISO 2015 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
6、or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO
7、copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.org BS ISO 6123-2:2015 ISO 6123-2:2015(E)Foreword iv Introduction v 1 Scope . 1 2 Normative references 1 3 Terms and definitions . 1 4 Surface quality
8、2 4.1 General . 2 4.2 Grades . 2 5 Surface finish 3 5.1 Methods of surface treatment Terms and classification 3 5.2 Description by surface treatment Types . 3 5.2.1 Type 1 Polished finish 3 5.2.2 Type 2 Fine grinding finish 3 5.2.3 Type 3 Standard grinding finish 3 5.2.4 Type 4 Turned finish . 3 5.2
9、.5 Type 5 Unground finish 4 5.2.6 Type S Special treatment . 4 5.3 Characterization by surface roughness . 4 5.3.1 Requirement 4 5.3.2 Method of testing . 4 5.3.3 Expression of results 6 5.3.4 Repeatability and reproducibility . 6 Annex A (informative) Relation between surface treatment and surface
10、roughness .7 ISO 2015 All rights reserved iii Contents Page BS ISO 6123-2:2015 ISO 6123-2:2015(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally ca
11、rried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work
12、. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the diffe
13、rent approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document ma
14、y be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/paten
15、ts). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO princip
16、les in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information The committee responsible for this document is ISO/TC 45, Rubber and rubber products, Subcommittee SC 4, Products (other than hoses). This third edition cancels and replaces the second edition (I
17、SO 6123-2:1988), of which it constitutes a minor revision to update the normative references. ISO 6123 consists of the following parts, under the general title Rubber or plastics covered rollers Specifications: Part 1: Requirements for hardness Part 2: Surface characteristics Part 3: Dimensional tol
18、erancesiv ISO 2015 All rights reserved BS ISO 6123-2:2015 ISO 6123-2:2015(E) Introduction Covered rollers are cylindrical cores, generally of metal, with a cover of rubber or plastics or a particular use. They are manufactured in a wide variety of sizes and hardness grades depending on the intended
19、use. ISO 2015 All rights reserved v BS ISO 6123-2:2015 Rubber or plastics covered rollers Specifications Part 2: Surface characteristics 1 Scope This part of ISO 6123 establishes a classification of rubber or plastics covered rollers according to surface quality or imperfections and surface finish.
20、A test method for the determination of surface roughness is also described. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated re
21、ferences, the latest edition of the referenced document (including any amendments) applies. ISO 3274, Geometrical Product Specifications (GPS) Surface texture: Profile method Nominal characteristics of contact (stylus) instruments ISO 4288, Geometrical Product Specifications (GPS) Surface texture: P
22、rofile method Rules and procedures for the assessment of surface texture ISO 23529, Rubber General procedures for preparing and conditioning test pieces for physical test methods 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 arithmetical me
23、an deviation of the profile R a arithmetical mean of the absolute values of the profile departures within the sampling length, l or approximately where n is the number of discrete profile deviations. Note 1 to entry: The values of R ain practice are determined within the evaluation length which incl
24、udes several sampling lengths. According to ISO 3274, the sampling length is equal to the cut-off. 3.2 ten point height of irregularities R z average value of the absolute values of the heights of five highest profile peaks and the depths of five deepest profile valleys within the sampling length IN
25、TERNATIONAL ST ANDARD ISO 6123-2:2015(E) ISO 2015 All rights reserved 1 BS ISO 6123-2:2015 ISO 6123-2:2015(E) wherey pi is the height of the ith highest peak profile;y vi is the depth of the ith deepest profile valley. Note 1 to entry: Depending on the shape of the profile, in certain cases, a probl
26、em arises associated with the lack of a number of profile peaks and valleys and/or the super-imposing of waviness on the roughness. 4 Surface quality 4.1 General The manufacturing process and the raw materials used in the manufacture of rubber or plastics covered rollers may cause sporadic imperfect
27、ions, in the form of holes and foreign matter, in the surface of the roller covers. The number, size and location of permissible surface imperfections shall be agreed between the interested parties. The type of surface finish (see Clause 5) shall be observed when selecting the grade of imperfections
28、. 4.2 Grades The rollers may be graded according to the permissible numbers and sizes of imperfections as follows: Grade x/y This means that imperfections up to and including x mm 2in area are acceptable; not more than two imperfections each having an area between x mm 2and y mm 2inclusive are permi
29、ssible in any 0,1 m 2of cover area; roller covers showing imperfections larger than y mm 2in area shall be rejected. The values of x and y shall be agreed between the interested parties. If no requirements for surface quality are necessary, the rollers shall be designated “grade N”. EXAMPLE A medium
30、 grade of surface quality can be described by the designation: Grade 0,5/2 This means that imperfections up to and including 0,5 mm 2in area are acceptable; not more than two imperfections each having an area be tween 0,5 mm 2and 2 mm 2inclusive are permissible in any 0,1 m 2of cover area; roller co
31、vers showing imperfections larger than 2 mm 2in area shall be rejected. If agreement between the interested parties, or special provisions in national standard, are intended, the required quality should be chosen from the grades given below: grade 0,1/0,3 grade 0,3/1 grade 0,5/2 grade 2/52 ISO 2015
32、All rights reserved BS ISO 6123-2:2015 ISO 6123-2:2015(E) grade 5/10 grade N 5 Surface finish The surface finish of a roller cover is dictated by the intended use. It shall be characterized either as a type of surface treatment (see 5.1) or as the maximum value of surface roughness (see 5.3), as agr
33、eed between the interested parties. 5.1 Methods of surface treatment Terms and classification Table 1 shows the generally employed principal methods of surface treatment, by means of which the roller surfaces are classified (see 5.2). The type of surface finish, and the structure or texture which ca
34、n be achieved, are dependent upon the hardness and composition of the roller cover. Table 1 Surface finishes Type Surface treatment Sequence of treatment 1 2 3 4 5 Polishing Grinding, fine Grinding, standard Turning Unground finish 5.2 Description by surface treatment Types The surface structures de
35、scribed for Types 1 to 4 are produced by regular treatments and have a roughness without preferential direction. The type required shall be chosen by agreement between the interested parties. 5.2.1 Type 1 Polished finish In soft elastomers, the surface is velvet-like; in hard rubber (ebonite) or pla
36、stics, it is smooth. Grinding marks and scratches shall not be visible to the naked eye. Sporadic grinding blemishes are permissible. Not all qualities permit this finish. 5.2.2 Type 2 Fine grinding finish Slight grinding and feed marks are visible to the naked eye, but are not noticeable when touch
37、ing the roller. 5.2.3 Type 3 Standard grinding finish Grinding marks and grinding feed are visible and just noticeable when touching the roller. 5.2.4 Type 4 Turned finish The surface is solely turned, with as little feed of the turning tool as practicable. Turning grooves are visible and noticeable
38、 when touching the roller. ISO 2015 All rights reserved 3 BS ISO 6123-2:2015 ISO 6123-2:2015(E) 5.2.5 Type 5 Unground finish The surface of the roller is without any treatment or dressing, for example a cloth-marked roller surface as it comes from the vulcanization process or a rough-cast plastics-c
39、overed roller. 5.2.6 Type S Special treatment This applies to surface finishes other than those in 5.2.1 to 5.2.5, for example a fine-cast plastics- covered roller, or to a finish for specific applications with a special structure as defined by agreement between the interested parties. 5.3 Character
40、ization by surface roughness 5.3.1 Requirement The surface finish of rubber or plastics covered rollers shall be quantitatively expressed in one of the following units, as agreed between the interested parties: a) arithmetical mean deviation of the profile R a(see 3.1), in micrometers; b) ten point
41、height of irregularities R z(see 3.2), in micrometers. The roughness of the cover surface shall appear visually uniform. 5.3.2 Method of testing 5.3.2.1 Test instrument: Profile meter a) General The determination of surface roughness shall be carried out by using a contact profile meter, system M, a
42、s specified in ISO 3274. Unless specified below, the basic parameters and metrological characteristics of the instrument shall be those specified in ISO 3274. The instrument shall be equipped with a suitable support for use on curved surfaces. The contact stylus shall be calibrated at the indicated
43、measurement values, for example by use of a reference surface of known roughness. b) Stylus Stylus angle: 1,57 rad (90) Radius of stylus tip: 5 m max. Static measuring force at mean level of stylus: 4 mN max. c) Sampling length, evaluation length and cut-off The sampling length l and the evaluation
44、length l nshall be as specified in ISO 4288. NOTE For rubberor plastics covered rollers, the following values of cut-off Bsampling length l and evaluation length l nare encountered in practice.4 ISO 2015 All rights reserved BS ISO 6123-2:2015 ISO 6123-2:2015(E) Table 2 Parameter for specified R a R
45、a m B mm l mm l n mm 0,1 up to 2 2 up to 10 0,8 2,5 0,8 2,5 4,0 12,5 Table 3 Parameter for specified R z R z m B mm l mm l n mm 0,5 up to 10 10 up to 50 0,8 2,5 0,8 2,5 4,0 12,5 5.3.2.2 Test conditions a) Temperature The test shall be carried out, whenever possible, at a standard temperature (23 C 2
46、 C or 27 C 2 C) in accordance with ISO 23529. The covered roller shall be brought to the test temperature prior to testing to ensure temperature equilibrium. The test temperature shall be recorded. b) Cover surface Before measurements are made, the cover surface shall be cleaned carefully to remove
47、dust and other contaminants which have collected during storage .The cleaning shall not damage the surface. NOTE Wiping the surface with isopropyl alcohol has been found suitable. 5.3.2.3 Test procedure a) Measuring areas For rollers having a cover up to 2,5 m long, the roughness shall be measured i
48、n five areas: three areas, each 120 apart, around the circumference in the middle of the roller; one area at each end, at a distance of 10 % of the cover length from the end. For rollers having a cover over 2,5 m long, the roughness shall be measured in nine areas: three areas, each 120 apart, aroun
49、d the circumference in the middle of the roller; three areas at each end, each 120 apart, around the circumference, and each at a distance of 10 % of the cover length from the end. b) Operation Firmly locate the roller to be tested with its longitudinal axis horizontal and with the area in which the surface roughness is to be measu
